Koki Ishii
| Personal information | |||
|---|---|---|---|
| Date of birth | March 15, 1995 | ||
| Place of birth | Shizuoka, Japan | ||
| Height | 1.72 m (5 ft 7+1⁄2 in) | ||
| Position | Midfielder | ||
| Team information | |||
Current team | AC Nagano Parceiro | ||
| Number | 16 | ||
| Youth career | |||
| –2006 | Sawaji SSS | ||
| 2007–2009 | Tokoha Gakuen Tachibana Junior HS | ||
| 2010–2012 | Tokoha Gakuen Tachibana HS | ||
| College career | |||
| Years | Team | Apps | (Gls) |
| 2013–2016 | Kansai University | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) |
| 2017–2022 | Gainare Tottori | 108 | (6) |
| 2023– | AC Nagano Parceiro | 16 | (0) |
| * Club domestic league appearances and goals as of 1 January 2026 | |||
Koki Ishii (石井 光輝, Ishii Kōki; born March 15, 1995) is a Japanese football player who plays for J3 League club AC Nagano Parceiro.